Heat exchanger



H. MERTA HEAT EXCHANGER Aug. 13, 1935.

Filed April 12, 1935 ATTORNEY Patented Aug. 13, 1935 V g V V v2,011,310.

HEAT EXCHANGER Hugo Mei-ta, La Crosse, Wis.

Application April 12, 1935, Serial No. 15,940

Claims. (01. 257248) My invention relates to an improvement inspot-welded to the side walls 8 and 1, respecheat exchangers. tively, ofthe channel section l3 and the wall One of the objects of my inventionis to proi8 abuts against the angle iron 5 so as to allow vide means forallowing the expansion of a heat movement of the angle iron 5 betweenthe wall 5 exchanger composed of headers and tubes with- E8 and the bedof the channel 9 longitudinally 5 out allowing a lateral movement of theheaders. with respect to the tubes 3, but the angle 5 is Another objectof my invention is to prevent prevented from moving in any otherdirection by the torsion of the tubes by any movement ofthe the wall l8,wall 9, and the side walls I and 8. headers other than in thelongitudinal direc- The angle 5 is made out of stiff metal material 10tion of the tube. rigidly attached to the headers 2. In connecting 10Another object of my invention is to allow the these heat exchangers toheating or cooling sysfree expansion of the tubes and the headers ofterns, the pipe connections leading to these heat the heat exchangerwithout subjecting them to exchangers are frequently of considerablelength shearing strains. and the expansion and contraction of the pipesThe various features of novelty which charactend to cause a movement ofthe headers lateral 5 terize my invention are pointed out in claims withrespect to the tubes. Also, when the headannexed to and forming a partof this specificaers are held in a fixed positionby the aforesaid tion,connecting pipes, the expansion of the tubes 3, In the accompanyingdrawing which illustrates due to heat or cold, frequently tend to causea my invention, Figure 1 is a side elevation of a, lateral movement ofthe headers with respect 130 2o corner of the heat exchanger. the tubes.It is desirable, therefore, in order to Figure 2 is a vertical sectionalelevation of a prevent shearing strains and stresses on the tubes,corner of the heat exchanger taken on the line which are of lightmaterial, to allow the headers 2-2 of Figure 1. 2 to move onlylongitudinally with respect to the Figure 3 is a vertical elevation ofthe heat extubes 3 and to prevent any movement of the 5 changer. headerslaterally.

Referring to Figure 3, l represents the heat It may be seen that anglemeans may be used exchanger composed of headers 2 connected by insteadof the side walls I and 8 to prevent the tubes 3, on which are mountedfins 4. On the lateral movement of the angle bars 5.

sides of the heat exchanger are the channel bars Although one specificembodiment of the in- 30 I3 extending between the headers 2. Thechanvention has been particularly shown and denel bars l3 are connectedby the reinforcing bars scribed, it will be understood that the invenl2,which extend across the heat exchanger and tion is capable ofmodification and that changes connect the opposite channel bars l3. Thechanin th con tr i n nd n the r an m nt of I nel bars l3 protect thefins 4 and with the reinthe various co-operating parts may be made with-35 forcing bars 12 form a support for the tubes 3. 1117 departingfrflmthe Spirit Scope of the These channel bars l3 are not normallyfastened invention, as expressed in the following claims: either to thefins or to the tubes, or header, but What I claim is: float so as toallow free expansion and contrac- 1. In a heat exchanger the combinationof'op- 40 tion of the tubes. However, without detracting posite headersconnected by metal tubes with 40 from their efliciency, one end of thechannel bars fins mounted thereon, channel sections secured may beaflixed to one of the headers. together and extending between saidheaders, and

Referring to Figure 2, the angle bar 5 isfasangle bars fastened to saidheaders andco-optened rigidly to the headers 2 by the bolt l0, eratingwith the first named channel sections to which extends through theheader 2 and the end allow movement of said headers only longitudi- 45wall 6 of the angle bar 5. The channel bars l3 nally with respect tosaid tubes. comprise the bottom 9 and the side walls I and 2. In a heatexchanger the combination of op- 8 of said channel. The angle bar 5 fitsalong the posite headers connected by metal tubes with fins bed 9 of thechannel section and fully occupies mounted thereon, channel sectionsextending bethe bed of the channel section so that the side tween saidheaders on the side of said exchanger, 50 of the angle bar 5 contactsthe side walls I and and angle bars fastened to said headers and co- 8of the channel section l3. operating with the first named channelsections I5 is a spacer angle which is sheet metal formed to allowmovement of said headers only longiup on three sides, making four sides,to wit: tudinally with respect to said tubes. sides l6, l1, l8 and IS.The sides l6 and II are 3. In a heat exchanger the combination of 55opposite headers connected by metal tubes with fins mounted thereon,side plates extending between said headers on the side of saidexchanger, and angle bars rigidly secured to said headersandco-operating with the said side plates to allow movement of saidheaders only longitudinally with respect to said tubes.

4. In a heat exchanger the combination of opposite headers connected bymetal tubes with fins mounted thereon, side plates extending betweensaid headers on the side of said exchanger, plates rigidly attached tosaid headers and arranged to slide on the first named plates, and= anglemeans mounted on one of said side plates to allow movement of saidplates, attached tothe headers, only longitudinally with respect to saidtubes.

5. In a heat exchanger the combination of opposite headers connected bymetal tubes with fins mounted thereon, side plates extending betweensaid headers on the side of said exchanger, and means rigidly attachedto said headers cooperating with said plates to allow movement of saidplates only longitudinally with respect to said tubes.

HUGO MER'I'A.

